The Xanthian Obelisk, also known as the Xanthos or Xanthus Stele, the Xanthos or Xanthus Bilingual, the Inscribed Pillar of Xanthos or Xanthus, the Harpagus Stele, and the Columna Xanthiaca, is a stele bearing an inscription currently believed to be trilingual, found on the acropolis of the ancient Lycian city of Xanthos, or Xanthus, near the modern town of Kınık in southern Turkey. The three languages are Ancient Greek, Lycian and Milyan (the last two are Anatolian languages and were previously known as Lycian A and Lycian B respectively). During its early period of study, the Lycian either could not be understood, or was interpreted as two dialects of one language, hence the term, bilingual. Another trilingual from Xanthus, the Letoon trilingual, was subsequently named from its three languages, Greek, Lycian A and Aramaic. They are both four-sided, both trilingual. The find sites are different. The key, unequivocal words are bilingual, Letoon, Aramaic, Lycian B, Milyan. The equivocal words are stele, trilingual, Xanthus or Xanthos. "The Xanthus inscription" might refer to any inscription from Xanthus.
The stele lay in plain sight for centuries, though the upper portion was broken off and toppled by an earthquake at some time in antiquity. While charting the Lycian coast, Francis Beaufort, then a captain in the Royal Navy, surveyed and reported on the ruins. Most of the ruins stood at elevated locations to which not even a mule trail remained. Reports of the white marble tombs, which were visible to travellers, attracted the interest of Victorian Age explorers, such as Charles Fellows.
On Saturday, April 14, 1838, Sir Charles Fellows, archaeologist, artist and mountaineer, member of the British Association and man of independent means, arrived in an Arab dhow from Constantinople at the port of Tékrova, site of ancient Phaselis. On Friday he had arrived in Constantinople from England to seek permission to explore. According to him he was bent on an Anatolian "excursion" around Lycia. Although his journal is in the first person, it is clear from the text that others were present, and that he had some equipment with him. He was known also to the British Museum and to the Royal Geographical Society, with whom he collaborated immediately on his return. The Ottoman Empire was on good terms with the British Empire, due to British support of the Ottomans during their defence against Napoleon. They granted permission and would cooperate in the subsequent removal of antiquities to the British Museum.